20315535736 has 8 divisors (see below), whose sum is σ = 38091629520. Its totient is φ = 10157767864.

The previous prime is 20315535731. The next prime is 20315535743. The reversal of 20315535736 is 63753551302.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (8).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (20315535731) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1269720976 + ... + 1269720991.

It is an arithmetic number, because the mean of its divisors is an integer number (4761453690).

Almost surely, 2^20315535736 is an apocalyptic number.

It is an amenable number.

20315535736 is a deficient number, since it is larger than the sum of its proper divisors (17776093784).

20315535736 is a wasteful number, since it uses less digits than its factorization.

20315535736 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2539441973 (or 2539441969 counting only the distinct ones).

The product of its (nonzero) digits is 283500, while the sum is 40.

The spelling of 20315535736 in words is "twenty billion, three hundred fifteen million, five hundred thirty-five thousand, seven hundred thirty-six".